Help me!am i pregnant?

last had my menstruation on Apr. 17,and right after my period, ,my bf came to me thinking it was safe to do it since i just had my period.May 17, he came to me again. He said it would be safe since I am about to have my period days after (im regular).I dont know yet if i am positive or not, and 4 days ago, I started taking bangkok pills to lose weight. What do you think?Can i still have my period?thank you very much..